2. Disconnect connectors from each solenoid valve.
3. Measure the resistance between tracks 1 and 2 of each solenoid valve connector (pic. 13.24).
Pic. 13.24. Solenoid valve resistance measurement
Resistance of all solenoid valves at 20°C: 2.7-3.4 Ohm
4. If the valve resistance is not as specified, replace the solenoid valve (pic. 13.25).
Pic. 13.25. The location of the solenoid valves in the valve block